What is the most likely reason why the author shows sunshine behind the boy in this graphic?

the boy is thinking of ways people can make energy from the sun.
the boy is showing the girl how to become a good citizen.
the boy is thinking of a bright idea about how to be a good citizen.
the boy is a bright star who participates in his community

Delegates: representatives who cast votes at a political party's national convention. binding: if a primary or caucus is “binding” that means the delegates won in that contest are legally bound to vote for a particular candidate at the parties national convention.a primary is a preliminary election used to determine a party's nominee for a specific office. the winner of the party's caucus, or primary, wins the party nomination for that state. then the delegates meet at their party's national party convention, which is a formal gathering of all party delegates from all states.